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Post by horsemenlilmike on Jan 26, 2013 12:11:30 GMT -5
have a 79 xs650 took the motor out of the frame to clean up welds that someone did a crappy job on and to paint the frame and tins. so the motor has a pamco ignition already in it all we did was lable each wire to reconnect them back to the right ones. got every thing painted put the motor back in and re conected all the wiring , now it acts like it out of time i wont start and back fires the whole time u try to start it HELP!!!!!!!! IF THERE IS ANYONE AROUND HERE THAT IS CLOSE AND CAN HELP I WOULD APPRECIATE IT.
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Post by Burns on Jan 26, 2013 18:21:18 GMT -5
Horseman,
I suggest:
1. be sure the battery is fully charged
2. check all grounds to the frame - you might well have painted one)
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Post by horsemenlilmike on Jan 28, 2013 11:48:57 GMT -5
the battery is charged had it charged and then just rechecked it to make sure it was and i will double check my grounds but i did remove paint from the areas before putting it back togather im just really floored right now
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Post by Burns on Jan 28, 2013 16:20:08 GMT -5
Well, you have to start narrowing things down and the best place to start is with your basic tuning issues.
adjust the tappets
adjust the cam chain
be sure you have fuel flowing to the carbs from the petcocks
check your voltage at the coil (with the switch on)
I'm kinda suspecting the kill switch, but that is just a guess. If
your voltage at the coil is low that's where I'd look first
static check your timing
be sure that both plugs are grounded when you do this (lay them on the fins with the coil-wire caps attached) 'cause the PAMCO unit can be fried if coil current doesn't have someplace to go.
p.s. while you are looking at your grounds don't forget the one that comes off the handlebars (it's lead is bolted to a handlebar perch stem)
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Post by horsemenlilmike on Jan 29, 2013 20:04:42 GMT -5
Could you give me a call I'm tryin to get this thing going and need help to many questions to ask on here
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Post by tomterrific on Jan 31, 2013 10:24:07 GMT -5
Hi Mike,
I would concentrate the search in two areas if the engine was running before it came out of the frame.
One is carburetion. Check to make sure the carbs are in the holders. Funny how one can blow out and the other holds it so close a quick inspection might not see the problem. The other is blocked idle jets. Moving the engine may have stired up dirt. Letting the engine sit may have varnish plugging the idle jet. Remove the mixture adjustment screw and blast the idle passage way by sticking the little tube from a can of spray carb cleaner inside. Let it sit a minute and blast again.
Now we are getting to ignition where I think your problem lies. You have reviewed the Pamco install instructions and made sure it is installed correctly? Bypass all the wiring by using jumper wires from the fully charged battery, + to the wire the kill switch goes into the Pamco and the coil. At this point it would be a good idea to jump the - to the engine and coil connection also. You now have direct grounds and wiring and if the plugs are new (I mean really new not just new a month ago) the ignition should work as best it can. You can tell where the flaw is by removing each wire, one at a time, and see if the problem comes back. If a ground wire shows bad then you need to clean up to get a good ground. If the + jumper shows bad you have a fault in the harness or switches on the path to the coil/Pamco. It is probably the kill switch because that is a known problem and my '77 did the backfire thing when the kill switch went bad.
Tom
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Post by Burns on Feb 1, 2013 18:07:44 GMT -5
If the motor was running fine when you took it out of the frame and you have not opened up either of the covers at the ends of the camshaft I very much doubt that timing is your issue.
And the PAMCO is pretty forgiving of weak current (my PM /no battery set-up with one is usually a first kick starter).
I'm thinking maybe your switch is the problem. It may be making an erratic connection.
As suggested, a jumper wire will eleminate that possibility as you narrow down "the usual suspects"
Like I said timing is probably not the issue, but it's easy enough to check:
1. take the cover off the ATU (the thing with the bob-weights on the other side of the PAMCO) and determine that the bob-weights have retuned to their resting position. i.e. the springs have pulled them compeletely back.
2. take both plugs out, put them in their caps and rest them on the fins.
3. take off the generator cover (the one on the shift lever side)
4. With a socket/breakerbar turn the bolt in the middle of the roter counter-clockwise while you watch for a spark at the plug gap
5. that spark should occur when the line on the roter is at the "F" on the stator housing.
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